HP 48gII hp 48gII_user's manual_English_E_HDPMSG48E67_V2.pdf - Page 431

BOXZ Zooming in and out of a given graph can be performed by using the softmenu key BOXZ. With BOXZ you select the rectangular sector (the "box") that you want to zoom in into. Move the cursor to one of the corners of the box (using the arrow keys), and press @)ZOOM @BOXZ. Using the arrow keys once more, move the cursor to the opposite corner of the desired zoom box. The cursor will trace the zoom box in the screen. When desired zoom box is selected, press @ZOOM. The calculator will zoom in the contents of the zoom box that you selected to fill the entire screen. If you now press @ZOUT, the calculator will zoom out of the current box using the H- and V-Factors, which may not recover the graph view from which you started the zoom box operation. ZDFLT, ZAUTO Pressing @ZDFLT re-draws the current plot using the default x- and y-ranges, i.e., -6.5 to 6.5 in x, and -3.1 to 3.1 in y. The command @ZAUTO, on the other hand, creates a zoom window using the current independent variable (x) range, but adjusting the dependent variable (y) range to fit the curve (as when you use the function @AUTO in the PLOT WINDOW input form („ò, simultaneously in RPN mode). HZIN, HZOUT, VZIN and VZOUT These functions zoom in and out the graphics screen in the horizontal or vertical direction according to the current H- and V-Factors. CNTR Zooms in with the center of the zoom window in the current cursor location. The zooming factors used are the current H- and V-Factors. ZDECI Zooms the graph so as to round off the limits of the x-interval to a decimal value. Page 12-50